Lavigne's rep told People exclusively that the two rockers are definitely engaged to be married.

Lavigne, 27, and Kroeger, 37, met in February when they collaborated on a song for Lavigne's upcoming fifth studio album, the magazine said.

"A romantic relationship blossomed as they spent time writing together," a friend of Lavigne told People.

But the two didn't come forward with the news as soon as it happened. Kroeger got down on one knee for Lavigne on Aug. 8, offering the pop princess a 14-carat diamond a rock as long as she promised Kroeger to be with him "until death do us part."

"He makes her so happy," a family member told People. "Both of their families could not be more excited."

While some tweeters were confused, others wished Avril Lavigne and Chad Kroeger the best of luck.